There are only 3
Oh well. I think that Jeezy's part was necessary for Hard. On the other hand, I think Photographs would have been a better song without's will.i.am part.
Justin Timberlake barley sings anything in Hole In My Head.
The song needs will.i.am. It would not be a standout on the album without his help. On the other hand, Hard would've still been good without Jeezy & TBH I always forget Slash is featured on Rockstar 101
Waiting to smash as a single... after Te Amo and Flopstar 
